Struct Snapshot 

pub struct Snapshot;

Full snapshot isolation. The default.

Reads never block and never abort. Writes abort with crate::Error::WriteConflict if another transaction committed a change to the same key after this transaction’s snapshot (first-committer-wins). Permits write skew.

Trait Implementations

impl Clone for Snapshot

fn clone(&self) -> Snapshot

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Snapshot

impl Debug for Snapshot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Snapshot

fn default() -> Snapshot

Returns the “default value” for a type.

impl IsolationLevel for Snapshot

const NAME: &'static str = "Snapshot"

Human-readable name, used in traces and error messages.

const REFRESH_SNAPSHOT_PER_STATEMENT: bool = false

Whether a fresh snapshot is taken before each statement rather than once at begin.

const FIRST_COMMITTER_WINS: bool = true

Whether the engine must check for write-write conflicts against versions committed after this transaction’s snapshot. False only for ReadCommitted, which re-reads the latest version before writing.

const VALIDATES_READS: bool = false

Whether reads are recorded and re-checked at commit. True only for Serializable.